Singh, Mohen <br/><br/>
UGC- CSIR JRF / NET Paper 1 (Science) / 
Mohen Singh ; M Gagan 
 - New Delhi:  Danika Publishing Company,  2011. 
 - 564p 
<br/><br/><label>ISBN: </label>8189301209 
<br/><br/><label>Dewey Class. No.: </label>500  / SIN/U